<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<form action="/request-demo/req4" method="post">
    <input type="text" name="username"/><br>
    <input type="password" name="password"/><br>
    <input type="checkbox" name="hobby" value="1"/> 游泳
    <input type="checkbox" name="hobby" value="2"/> 爬山 <br>
    <input type="submit">

</form>


</body>
</html>